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Asked Sep 18, 2019
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  1. In humans, why is it that the mother determines whether her sons will get recessive sex-linked traits?
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Human X and Y chromosomes determine the biological sex of a person. XX specifies female and XY specifies male. The Y chromosome contains a small region of similarity with the X chromosome and that is the reason why they can pair during meiosis. However, the Y chromosome is much shorter and contains many fewer genes. 

X-linked recessive inheritance is...

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